The satchel is very stable. It is made of a durable material that is easy to maintain at the same time. For stains, it is sufficient to treat the area with a damp cloth. Inside the satchel very spacious. Smaller compartments to store z. B. a bus pass are available. Two side pockets outside offer enough space for bottles. The satchel has highly reflective and thus very high visibility wide and narrow strip / surfaces. The back panel is ergonomosch swinging and tested and recommended by the Federal Association of German Back Schools. The quality of the set belonging parts: Pencil Case, model-making ashes, sports bag and breast pocket I appreciate also very high. Even if the set is not one of the cheap, I highly recommend it.